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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (LH) causes female's egg to break (her period)






2. Duct through penis that carries sperm and urine






3. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






4. Urinary calculi.






5. 265-285 days






6. Not under a timeline - cow can not be sold as steak






7. 1. brain function - 2. blood flow - 3. willing female






8. Front feet and head first. (except for hogs and dogs)






9. Allows extension of penis without fibro-elastic penis






10. Luteolysis happens because of the ____________ hormone






11. Milk is 15% ________ and 85% __________.






12. Implies the amount of estrogen production






13. 283 days






14. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






15. Look for infection - split - and rupture of the penis






16. Luteolysis happens because of the ____________ hormone






17. Why Dairy calves are fed powdered milk.






18. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






19. Depository for semen during insemination. where urine leaves the body






20. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






21. Provide nourishment for the developing sperm






22. Animals which have many estrous periods per year (ex: cow - sow)






23. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






24. Days which have increasing daylight hours

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25. Way to know everything is alright with the breeding male






26. 16-20 hours






27. Milk ~305 days - dry 60 days prior to calving






28. ~305 days (altough often longer due to breeding difficulties)






29. 30 hours after estrus begins






30. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






31. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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32. Important 'landmark' during palpation






33. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






34. 2 month growth cycle. stored in the epididymis of the bull






35. When are dairy cattle dehorned?






36. 16-20 hours






37. 147 days






38. (male) pushes the testes upward toward the body for warmth or protection






39. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






40. Microscopic - make sure not sterile - very few bulls are actually tested






41. Implies the amount of estrogen production






42. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






43. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






44. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






45. 2 month growth cycle. stored in the epididymis of the bull






46. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






47. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






48. 336 days






49. Days which have decreasing daylight hours

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50. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders